AP1120
DUAL 1A LOW DROPOUT POSITIVE REGULATOR
AP1120 Rev. 2 1 of 7 FEBRUARY 2009
www.diodes.com © Diodes Incorporated
Lead-free
• 1.3V maximum dropout at full load current
• Fast transient response
• Output current limiting for each channel
• Built-in thermal shutdown each channel
• Good noise rejection
• Dual output ch1=3.3V, ch2=2.5V
(1.8V for B version)
• Lead Free Package: SOP-8L
• Lead Free Finish/ RoHS Compliant (Note 1)
AP1120 series are low dropout positive regulator to provide
1A output current capability. The product is specifically designed
to provide well-regulated supply for low voltage IC applications
such as high-speed bus termination and low current 3.3V/2.5V or
3.3V/1.8V logic supply. AP1120 series are guaranteed to have
<1.3V dropout at full load current making it ideal to provide well
regulated outputs dual channels with up to 18V input supply.
• PC peripheral
• Communication
AP 1120 S X L - 13
13 : Tape & Reel
Lead Free
L : Lead Free
Packing
Vout
Blank : CH1=3.3V
CH2=2.5V
B : CH1=3.3V
CH2=1.8V
Package
S : SOP-8L
Device Package
Code Packaging
(Not e 2) 13” Tape and Reel
Quantity Part Number Suffix
AP1120SXL-13 S SOP-8L 2500/Tape & Reel -13
Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exempti ons applied. Please visit our website at
http://www.diodes.com/products/lead_free.html.
2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be on found our website at
http://www.diodes.com/datasheets/ap02001.pdf.
Features General Description
Applications
Ordering Information
AP1120
DUAL 1A LOW DROPOUT POSITIVE REGULATOR
AP1120 Rev. 2 2 of 7 FEBRUARY 2009
www.diodes.com © Diodes Incorporated
Pin Assignments
GND1
VIN 2
VIN 1
GND 2
1
2
3
4
8
7
6
52.5V (1.8V)
3.3V
2.5V (1.8V)
3.3V
SOP-8L
AP1120
( Top View )
Pin Descriptions
Pin Name Description
GND1/2 Ground
3.3V (Vout1) The output of the regulator. A minimum of 10uF capacitor (0.15Ω ≤ ESR ≤ 20Ω) must be
connected from this pin to ground to insure stability.
2.5V/1.8V
(Vout2)
VIN1/2 The input pin of regulator. Typically a large storage capacitor (0.15Ω ≤ ESR ≤ 20Ω) is
connected from this pin to ground.
AP1120
DUAL 1A LOW DROPOUT POSITIVE REGULATOR
AP1120 Rev. 2 3 of 7 FEBRUARY 2009
www.diodes.com © Diodes Incorporated
Block Diagram
2
Thermal
Shutdown
7,8
Vout 1
1.25V +
+
CURRENT
LIMIT
Vin 1
+
+
1
GND 1
4
Thermal
Shutdown
5,6Vout 2
1.25V +
+
CURRENT
LIMIT
Vin 2
+
+
3
GND 2
-
-
-
-
Typical Circuit
5V 3.3V/1A
(3.3V/2.5V Dual output )
C2
100uF
Vin1
3.3V
GND1
GND2
Vin2
3.3V
2.5V
2.5V
C1
100uF
C3
100uF
2.5V/1A
AP1120
DUAL 1A LOW DROPOUT POSITIVE REGULATOR
AP1120 Rev. 2 4 of 7 FEBRUARY 2009
www.diodes.com © Diodes Incorporated
Absolute Maximum Ratings
Symbol Parameter Rating Unit
VIN DC Supply Vo ltage -0.3 to 18 V V
PD Power Dissipation Internally Limited
TST Storage Temperature -65 to +150 oC
TOP Operating Junction Temperature Range 0 to +150 oC
Electrical Characteristics (Under Operating Conditions)
Paramete
r
Conditions Min Typ. Max Unit
Output Voltage
AP1120(B) - VOUT1 IOUT = 10mA, TA = 25oC,
4.8V≦VIN≦12V 3.235 3.300 3.365 V
AP1120 - VOUT2 IOUT = 10mA, TA = 25oC,
4V≦VIN≦12V 2.450 2.500 2.550 V
AP1120B - VOUT2 IOUT = 10mA , TA = 25oC,
4V≦VIN≦12V 1.764 1.800 1.836 V
Line Regulation IO=10mA,VOUT+1.5V<VIN<12V, TA =25oC 0.2 %
Load Regulation
AP1120 series
VOUT1 VIN = 5V, 0≦IOUT≦1A,
TA =25oC (Note 3, 4) 26 33 mV
AP1120 series
VOUT2 VIN=4V, 0mA<Io<1A,
TA =25oC (Note 3, 4) 20 25 mV
Dropout Voltage
(VIN-VOUT) IOUT = 1A,ΔVOUT=0.1%VOUT 1.3 1.4 V
Current Limit (VIN-VOUT) = 5V 1. 1 A
Minimum Load Current 0oC≦Tj≦125oC (Note 5) 5 10 mA
Thermal Regulation TA=25 oC, 30ms pulse 0.008 0.04 %/W
Ripple Rejection F=120Hz,COUT=25uF Tantalum, IOUT=1A 60 70 dB
Temperature Stability IO=10mA 0.5 %
JA
θ
Thermal Resistance
Junc t i o n- t o - A m bi ent (No
heat sink; No air flow)
SOP-8L: Control Circuitry/Power Transistor
(Note 6)
CH1 or CH2 only
CH1 & CH2 and PD1=PD2
50
45
OC/W
JC
θ
Thermal Resistance
Junction-to-Case
SOP-8L: Control Circuitry/Power Transistor
(Note 6)
CH1 or CH2 only
CH1 & CH2 and PD1=PD2
20
12
OC/W
Notes: 3. See thermal regulation specifications for changes in output voltage due to heating effects. Line and load regulation are
measured at a constant junction temperature by low duty cycle pulse testing. Load regulation is measured at the output
lead = 1/18” from the package.
4. Line and load regulation are guaranteed up to the maximum power dissipation of 15W. Power dissipation is determined by
the input /output differentially and the output current. Guaranteed maximum power dissipation will not be available over the
full input/output range.
5. Quiescent cur rent is defi ned as the minimum output current that requi res maintai n ing regulation. At 12V input/output
differential the device is guaranteed to regulate if the output current is greater than 10mA.
6. Vout1 and Vout2 are connected to the PCB copper area 5.5mm*5.5mm separately. If you need large PD or lower Tc & Tj,
please connect to the large copper area >> 5.5mm*5.5mm (like 10mm*10mm).
AP1120
DUAL 1A LOW DROPOUT POSITIVE REGULATOR
AP1120 Rev. 2 5 of 7 FEBRUARY 2009
www.diodes.com © Diodes Incorporated
Typical Performance Characteristics
Temperature (
o
C)
Percent Change in Output Voltage vs Temperature
Output Voltage Change (%)
-50 -25 0 25 50 75 100 125 150
- 2
-1.5
- 1
-0.5
0
0. 5
1
1.5
2
Input Voltage (V)
Line Regulation
Output Voltage Deviation (%)
0
0.2
0.4
0.6
0.8
1
24
6 8 10 12
TIME (us)
Line Transient Response
Output Voltage Deviat i on (mV) Input Voltage (V)
-40
-20
0
20
40
5.5
6.5
7.5 Cin=1uF
Cout=10uF Tantalum
0 20 40 60 80 100 120 140 160 180 200
TIME (us)
Load Transient Response
Load Current (A) Output Voltage Deviation (mV)
010
20 30 40 50 60 70 80 90 100
-1
0
1
2
-20
-10
0
10
20
30 C in = 1uF
C out = 1 0 uF Tantalum
Preload = 100mA
Dropout Voltage vs Output Current
Temperature (
o
C)
Load Re gulation vs Temperature
Output Voltage Deviation (%)
-25 0 25 50 75 100 125
- 1
-0.80
-0.40
-0.20
0
0.20
I load=800mA
Output Current (mA)
Dropout Voltage
(
V
)
0
0. 2
0. 4
0. 6
0. 8
1. 0
1. 2
1. 4
1. 6
1. 8
2. 0
0250 500 750 1000
Tj = 125
o
C
Tj = 25
o
C
AP1120
DUAL 1A LOW DROPOUT POSITIVE REGULATOR
AP1120 Rev. 2 6 of 7 FEBRUARY 2009
www.diodes.com © Diodes Incorporated
Marking Information
(1) SOP-8L
( Top View )
AP1120 X
YY WW
XX
Logo
Part Number
5
8
41
WW : Week : 01~52; 52
YY : Year : 08, 09,10~
L : Lead Free
X : Internal Code
represents 52 and 53 week
Blank : 3.3V/2.5V version
B : 3.3V/1.8V version
Package Information (All Dimensions in mm)
(1) Package type: SOP-8L
1.27typ 0.3/0.5
7°~9°
4.85/4.95
3.85/3.95
5.90/6.10
0.15/0.25
7°~9°
0.62/0.82
0.10/0.20
Gauge Plane
0.254
Seating Plane
0.35max. 45°
Detail "A"
Detail "A"
1.30/1.50
1.75max.
Land Pattern Recommendation
(Unit: mm)
6x-1.27
8x-1.55
8x-0.60
5.4
0°/8°
AP1120
DUAL 1A LOW DROPOUT POSITIVE REGULATOR
AP1120 Rev. 2 7 of 7 FEBRUARY 2009
www.diodes.com © Diodes Incorporated
IMPORTANT NOTICE
LIFE SU PPOR T
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further
notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither
does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall assume all risks of such use and will
agree to hold Diodes Incorporated and all the companies whose products are represented on our website, harmless against all damages.
Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the
President of Diodes Incorporated.
